1256318 - Minimize, maximize and close buttons shrink considerable when switching from low dpi monitor to retina display

Status: RESOLVED DUPLICATE of bug 1247272

(Firefox :: Toolbars and Customization, defect)

Description

[Bogdan Maris, Desktop Test Engineering]

Attachment: Screenshot showing the issue

[Note]:
-

[Affected versions]:
- Developer Edition 47.0a2
- Latest Nightly 48.0a1

[Affected platforms]:
- Mac OS X 10.11.1 (Macbook with Retina display + another monitor 'fullHD or lower')

[Steps to reproduce]:
1. Start Firefox on the second monitor
2. Move Firefox to Retina display

[Expected result]:
- No layout, theme issues can be seen, the scaling of items is properly done.

[Actual result]:
- Minimize, maximize and close icons are visible shrinked.

[Regression range]:
- I was unable to make mozregression work from some unknown reason (will try to make it work asap). I did a manual regression on mozilla-central tinderbox builds:

Last good build: 2016-02-09
First bad build: 2016-02-10

https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=d1a54ae63da7ebc4bc1eeb5b613e8ec29bfcb80a&tochange=2dfb45d74f42d2a0010696f5fd47c7a7da94cedb

Please set the regressionwindow-wanted in keywords if a more indepth regression is needed.

[Additional notes]:
- Screenshot with the issue attached.

Comment 1

[Bogdan Maris, Desktop Test Engineering]

Jonathan, do you think this has something to do with per-monitor DPI feature? I know it's not supported on Mac but maybe something broke related to the feature might have broke this.

Comment 2

[Jonathan Kew [:jfkthame]]

This sounds like bug 1247272 to me, which is a regression from bug 1243418.